高壓脈沖放電電極氣隙擊穿點(diǎn)特征的試驗(yàn)研究
李洪陽(yáng)
(北京市雷閃防雷設(shè)施檢測(cè)服務(wù)中心,北京 102299)
摘 要:針對(duì)高壓脈沖放電中異形放電電極對(duì)電弧路徑起始點(diǎn)影響的特征,使用馬克思發(fā)生器制造高壓脈沖電弧,通過(guò)更換不同形狀的正負(fù)電極形成不同的電弧路徑,觀察多次放電試驗(yàn)并進(jìn)行樣本統(tǒng)計(jì)。得出了高壓脈沖電弧正極放電發(fā)射點(diǎn)只受極間距離影響,在氣隙擊穿至負(fù)電極的最短距離處形成電弧。負(fù)電極的擊打點(diǎn)與其曲率半徑相關(guān),在最小曲率面處被擊穿。通過(guò)氣隙擊穿放電路徑的選擇性試驗(yàn)研究,為探究雷電放電路徑選擇性的規(guī)律提供了參考。
關(guān)鍵詞:高壓脈沖放電;氣隙擊穿;發(fā)射點(diǎn);擊打點(diǎn);曲率半徑
中圖分類(lèi)號(hào):TM835;TM862 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2020)09-0047-04
Experimental Study on the Characteristics of Air Gap Breakdown Point of High Voltage Pulse Discharge Electrode
LI Hong-yang
(Beijing Leishan Testing Service Center of Lightning Protection Facilities, Beijing 102299, China)
Abstract: In view of the characteristics of the effect of abnormal discharge electrodes on the starting point of arc path in high voltage pulse discharge, a Marx generator was used to create a high-voltage pulse arc, by changing the positive and negative electrodes of different shapes to form different arc paths, observe multiple discharge tests and conduct sample statistics.It is concluded that the emission point of positive electrode is only affected by the distance between the electrodes, and an arc is formed at the shortest distance from the gap to the negative electrodes.The strike point of the negative electrode is related to its radius of curvature and is broken down on the minimum curvature surface.The selectivity test of air gap breakdown discharging path is helpful to explore the selectivity rule of lightning discharging path. Suggestions for design of needle selection and equipment manufacturing of direct lightning protection flasher are given.
Key words: high voltage pulse discharge; air gap breakdown; emission point; strike point; radius of curvature
參考文獻(xiàn)
[1] 李瑞芳,吳廣寧,曹曉斌,等. 尖端- 尖端的火花放電路徑的選擇性[J]. 天津大學(xué)學(xué)報(bào),2009,42(6):497-501.
[2] 王萬(wàn)昆,藍(lán)磊,安韻竹,等. 組合空氣間隙放電路徑選擇性試驗(yàn)[J]. 高電壓技術(shù),2017,43(11):3800-3808.
[3] 馬宏達(dá). 各種避雷針的結(jié)構(gòu)及其防雷性能[J]. 電網(wǎng)技術(shù),2000,24(12):53-57.
[4] 沈其工,方瑜,周澤存,等. 高電壓技術(shù)[M].4 版. 北京:中國(guó)電力出版社,2019.
[5] 鄭殿春,丁寧,沈湘東,等. 基于分形理論的尖-板電極短空氣隙放電現(xiàn)象[J]. 物理學(xué)報(bào),2016,65(2):1-6.
[6] 王羽,李志軍,戴敏,等. 長(zhǎng)空氣間隙負(fù)極性操作沖擊放電特性研究(I)——試驗(yàn)研究[J]. 中國(guó)電機(jī)工程學(xué)報(bào),2014,34(21):3534-3540.
[7] 陳昌漁,王昌長(zhǎng),高勝友. 高電壓試驗(yàn)技術(shù)[M].4 版.北京:清華大學(xué)出版社,2017.
[8] 譚涌波,張?chǎng)危虼貉啵? 建筑物上側(cè)擊雷電的三維數(shù)值模擬[J] . 應(yīng)用氣象學(xué)報(bào),2017,28(2):227-236.
[9] 周?chē)?guó)軍,梁忠武,尹娟,等. 基于GB 50057 的側(cè)擊雷電流特征分析[J]. 氣象科技,2017,45(4):761-764.
[10] 李華,曾德查,劉鈞譽(yù),等. 針尖曲率對(duì)敞開(kāi)式針-柱電極結(jié)構(gòu)氣體放電的影響[J]. 納米技術(shù)與精密工程,2015,13(1):17-21.